diff --git a/abseil-in-webrtc.md b/abseil-in-webrtc.md
index 0541d3c..8615a33 100644
--- a/abseil-in-webrtc.md
+++ b/abseil-in-webrtc.md
@@ -23,9 +23,11 @@
 * `absl::variant` and related stuff from `absl/types/variant.h`.
 * The functions in `absl/algorithm/algorithm.h` and
   `absl/algorithm/container.h`.
+* `absl/base/const_init.h` for mutex initialization.
 * The macros in `absl/base/attributes.h`, `absl/base/config.h` and
   `absl/base/macros.h`.
 
+
 ## **Disallowed**
 
 ### `absl::make_unique`
@@ -34,7 +36,7 @@
 
 ### `absl::Mutex`
 
-*Use `rtc::CriticalSection` instead.*
+*Use `webrtc::Mutex` instead.*
 
 Chromium has a ban on new static initializers, and `absl::Mutex` uses
 one. To make `absl::Mutex` available, we would need to nicely ask the